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Human Anatomy > Nervous System > Flashcards

Flashcards in Nervous System Deck (32):
1

Nervous System

the network of nerve cells and fibers that transmits nerve impulses between parts of the body

2

Sensory Input

How the brain processes feeling such as touch, sight, hearing, taste and smell

3

Integration

the coordination of processes in the nervous system

4

Central Nervous System

part of the nervous system consisting of the brain and spinal cord

5

Peripheral System

the PNS consists of the nerves and ganglia outside the brain and spinal cord

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Somatic Nervous System

controls voluntary control of body movements by using skeletal muscles

7

Autonomic Nervous System

the part of the nervous system controlling all of the organs

8

Neuraglia

cells that form myelin that support, protect, and maintain quilibrium

9

Astrocytes

are a sub type of glial cells

10

Microglia

the resident immune cells of the central nervous system

11

Ependymal cells

cells lining the ventricle of the brain and the central canal of the spinal cord

12

Oligodendrocytes

provide support and protection to axons in the central nervous system

13

Schwann cells

any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons

14

Satellite cells

precursors of skeletal muscles

15

Neurons

electrically excitable nerve cells

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Dendrites

a short branched extension of a nerve cell

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Axons

the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.

18

Axon Hillock

is a specialized part of the cell body that connects to the axon

19

Nodes of Ranviar

The action potential travels from one location in the cell to another

20

Depolarization

loss of polarization; especially : loss of the difference in charge between the inside and outside of the plasma

21

Action Potential

the change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or nerve cell

22

Repolarization

change in membrane potential that returns it to a negative value just after the depolarization phase

23

Cerebrum

the principal and most anterior part of the brain in vertebrates, located in the front area of the skull and consisting of two hemispheres,

24

Parietal Lobe

either of the paired lobes of the brain at the top of the head, including areas concerned with the reception and correlation of sensory information

25

Myelin

a mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers, increasing the speed at which impulses are conducted.

26

Axon Terminals

the enlarged endings of axons that make synaptic contacts with other nerve cells or with effector cells

27

Frontal Lobe

each of the paired lobes of the brain lying immediately behind the forehead, including areas concerned with behavior, learning, personality, and voluntary movement

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Occipital Lobe

the rearmost lobe in each cerebral hemisphere of the brain

29

Temporal Lobe

each of the paired lobes of the brain lying beneath the temples, including areas concerned with the understanding of speech

30

Gray matter

the darker tissue of the brain and spinal cord, consisting mainly of nerve cell bodies and branching dendrites.

31

Cerebral White Matter

one of the two main solid components of the central nervous system. It is composed of myelinated nerve cell processes, or axons

32

Cerebellum

the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity